feat: Allow reading an access token

internal/gitea/client.go

@@ -38,6 +38,8 @@ type Repository struct {
 }
 
 type GiteaClient struct {
+	Token string
+
 	GetRepository GetRepositoryMethod
 	HasBranch     HasBranchMethod
 	HasUser       HasUserMethod
@@ -46,8 +48,9 @@ type GiteaClient struct {
 	LookupRepoTXT LookupRepoTXTMethod
 }
 
-func NewGiteaClient(giteaUrl string, giteaClient *gitea.Client) GiteaClient {
+func NewGiteaClient(giteaUrl string, token string, giteaClient *gitea.Client) GiteaClient {
 	return GiteaClient{
+		Token: token,
 		GetRepository: func(username, repositoryName string) (Repository, error) {
 			repo, _, err := giteaClient.GetRepo(username, repositoryName)
 			if err != nil {
@@ -91,6 +94,11 @@ func NewGiteaClient(giteaUrl string, giteaClient *gitea.Client) GiteaClient {
 			if since != nil {
 				sinceFormat := since.Format(time.RFC1123)
 				req.Header.Add("If-Modified-Since", sinceFormat)
+
+				// Add authentication, if we have a token
+				if token != "" {
+					req.Header.Add("Authorization", "token "+token)
+				}
 			}
 			resp, err := client.Do(req)
 			if err != nil {